Two charges 6 micro coulomb and 15 micro coulomb are placed along the x- axis at x = 0 and x = 2mrespectively. A negative charge is placed between them such that the resultant force on it is zero. The negative charge is placed at

Electric field due to point charge:E=14πε0qr2Condition for zero force:14πε0q1x2=14πε0q22-x2q1x2=q22-x22-xx2=q2q12-xx=1562-xx=1.582-x=1.58xx=22.58  =0.78 m (from 6 micro coulomb)

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0.76 units towards 15 micro col...charge...
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